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课堂上进行观察实验的方式,不能仅限于实验课。实验课的内容是把过去讲过的某些知识,集合在一起,以一课的时间来进行的。它的优点是有系统、全面、并且进行了一次很深刻的复习。如果教师把实验课当作组织实验的唯一方式,在平日教学中只以间接的直观教具(挂图模型等)来代替一切实物,不使学生及时看到所研究的对象不做一定的实验,那么就要产生很严重的缺点。间接的直观教具和实物之间是有区别的。只靠图表或模型决不会帮助学生形成精确而深
The way to observe the experiment in the classroom can not be limited to the experimental class. The content of the experiment class is to put together some of the knowledge we have talked about in a lesson’s time. Its advantages are systematic, comprehensive, and a very deep review. If teachers regard experiment class as the only way to organize experiment, only use indirect intuition teaching aids (wall chart model etc.) instead of all kind of material in weekdays teaching, do not make students see the subject in time and do not do some experiments, then It is necessary to have serious shortcomings. Indirect visual aids and in-kind there is a difference. Charts or models alone will never help students form precise and deep